Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications

The ISL6235 provides a highly integrated power control and protection solution for five output voltages required in highperformance notebook PC applications. The IC integrates three fixed frequency pulse-width-modulation (PWM) controllers and two linear regulators along with monitoring and protection circuitry into a single 24 lead SSOP package.

特性 Features

? PWM Only Mode for Reduced Noise at Light Loads

? Provides Five Regulated Voltages

??? - +5V ALWAYS

??? - +3.3V ALWAYS

??? - +5V Main

??? - +3.3V Main

??? - +12V

? High Efficiency Over Wide Line and Load Range

??? - Synchronous Buck Converters on Main Outputs

? No Current-Sense Resistor Required

??? - Uses MOSFET’s rDS(ON)

??? - Optional Current-Sense Resistor for More Precision

? Operates Directly From Battery 5.6 to 24V Input

? Input Undervoltage Lock-Out (UVLO)

? Excellent Dynamic Response

??? - Voltage Feed-Forward and Current-Mode Control

? Monitors Output Voltages

? Synchronous Converters Operate Out of Phase

? Separate Shut-Down Pins for Advanced Configuration and Power Interface (ACPI) Compatibility

? 300kHz Fixed Switching Frequency on Main Outputs

? Thermal Shut-Down Protection

Applications

? Mobile PCs

? Hand-Held Portable Instruments

? LCD PCs

? Cable Modems

? DSL Modems

? Set Top Box